Broadleaf evergreens such as hollies and rhododendrons loose moisture all year. Using an anti-desiccant product such at Wilt-Pruf can help protect these types of plants. Spraying an anti-desiccant is one method of prevention. If you choose use this type of product spray in the mid-morning when temperatures are above freezing, preferably around 40 degrees F. Do not spray in the sun or during a windy day. Spray the tops and bottoms of the leaves unti...